Google: Nano Banana 2 (Gemini 3.1 Flash Image Preview)

GoogleID: google/gemini-3.1-flash-image-preview

Gemini 3.1 Flash Image Preview, a.k.a. "Nano Banana 2," is Google’s latest state of the art image generation and editing model, delivering Pro-level visual quality at Flash speed. It combines advanced contextual understanding with fast, cost-efficient inference, making complex image generation and iterative edits significantly more accessible. Aspect ratios can be controlled with the [image_config API Parameter](https://openrouter.ai/docs/features/multimodal/image-generation#image-aspect-ratio-configuration)

Pricing per 1M Tokens

Input (Prompt)$0.50
Output (Completion)$3.00
Cache ReadFree
Cache WriteFree
ImageN/A

Specifications

Context Length66K
Max Output Tokens66K
Input ModalitiesImage + Text
Output ModalitiesImage + Text
TokenizerGemini
Instruct TypeN/A
Top Provider Context66K
Top Provider Max Output66K
ModeratedNo

Compare this model

See how Google: Nano Banana 2 (Gemini 3.1 Flash Image Preview) stacks up against other models.

vs Google: Gemini 3.1 Flash Lite Previewvs Google: Gemini 3.1 Pro Preview Custom Toolsvs Google: Gemini 3.1 Pro Previewvs Google: Gemini 3 Flash Previewvs Google: Nano Banana Pro (Gemini 3 Pro Image Preview)

More from Google

Google: Gemini 3.1 Flash Lite Preview
Input$0.25
Context1.0M
Google: Gemini 3.1 Pro Preview Custom Tools
Input$2.00
Context1.0M
Google: Gemini 3.1 Pro Preview
Input$2.00
Context1.0M
Google: Gemini 3 Flash Preview
Input$0.50
Context1.0M
Google: Nano Banana Pro (Gemini 3 Pro Image Preview)
Input$2.00
Context66K

Last updated: March 23, 2026

First tracked: March 23, 2026